You need to work on reading comprehension and attention to detail.
He wrote: "at a time when trans-Pacific travel likely was at a speed half of todays jets. I read that he's saying that she was more likely to have flown on a prop job rather than a DC-8, 707 or Convair 880/990, and that if she did the flight would be longer in duration. It would also probably be cheaper.
http://www.everythingpanam.com/Ads_Page_2.html
Pan Am was a/the Major carrier to the Pacific and other worldwide destinations in the 50’s and 60’s These ads promote low fares to Hawaii, fast jet service etc..3 pages of ads page 2 has 60’s